KR102192213B1 - Method for manufacturing carbon fiber mats and intermediate material impregnated with thermosetting resin using the same - Google Patents

Abstract

The present invention is a continuous transport unit for continuously transporting the material is sequentially stacked; A carbon fiber supply unit located upstream of the continuous transport unit; And a processing unit located downstream of the continuous transport unit than the carbon fiber supply unit, and processing the laminated carbon fibers supplied through the carbon fiber supply unit into a carbon fiber mat. Using a carbon fiber mat manufacturing apparatus comprising: The present invention relates to a method of manufacturing a carbon fiber mat, and it is possible to provide a method of manufacturing a carbon fiber mat excellent in impregnation and uniform dispersion of carbon fibers.

Description

Method for manufacturing carbon fiber mats and intermediate material impregnated with thermosetting resin using the same}

The present invention relates to a method of manufacturing a carbon fiber mat and a carbon fiber mat impregnated with a thermosetting resin as an intermediate material.

Herein, background art related to the present disclosure is provided, and these do not necessarily mean known art.

Carbon fiber composites molded by combining carbon fibers and resins are lightweight materials that replace metals, and are used for aerospace, sports and leisure products, wind power generation blades, medical devices, electronic products, parts such as automobiles, and reinforcing materials for construction and civil engineering structures. The furnace usage is increasing significantly.

In order to expand the application market of parts made of carbon fiber composites, it is necessary to reduce the manufacturing cost of carbon fiber composites by using recycled carbon fibers, and to develop technology for mass production of high-strength carbon fiber composite parts.

In the case of recycled carbon fiber, it is not easy to manufacture carbon fiber composite parts again because the shape is not uniform. Therefore, in order to manufacture a component using a carbon fiber composite, it is essential to manufacture it in the form of an intermediate material in the form of a nonwoven fabric or a long fiber form.

The manufacturing process of the intermediate material in the form of a nonwoven fabric may be divided into a wet process such as wet laid and a dry process such as carding and air laid. The wetlaid method, which is a wet process, is a method of manufacturing using water and is suitable for manufacturing thin veils, and due to the limitations of the length and content of carbon fibers in the process, and the cost of drying water after manufacturing, There is a problem that it is difficult to use as a composite reinforcing material. The carding method, which is a dry process, is a method of combing using a comb with a needle attached to it.As a traditional nonwoven fabric manufacturing method, there are problems that the carbon fiber is severely damaged, the workability due to dust is bad, the working speed is slow, and there is a possibility of fire.

Another dry process, the air-laid method, is a method that can produce a mat at high speed without limiting the length or content of carbon fibers. However, in the case of using carbon fiber in general air-laid equipment, a fire may occur due to static electricity generated between carbon fibers. A process of randomly mixing carbon fibers cut to a certain size before manufacturing nonwoven fabrics, and carbon fiber dust during air laying. This is scattered into the air and attached to electricity and electric heating devices, causing a short circuit, and if the length of the cut carbon fiber is longer, there is a problem that the mixing and dispersibility of the fiber is inferior.So far, the wet-laid method using carbon fiber There have been reports of non-woven fabrics produced by the over-carding method, but few cases have been reported to produce non-woven fabrics by the air-laid method.

On the other hand, in the case of parts used in automobiles, glass fiber is used as a filler, but it is difficult to use main body parts because it does not have high stiffness characteristics. When the filler is made of carbon fiber, the mechanical strength is excellent. It is suitable for use as a body part, but it is necessary to supplement technologies such as development of manufacturing method, reduction of molding time, and reduction of manufacturing cost.

1. Korean Patent Publication No. 10-1997-0702828 (1997.06.10) 2. Korean Patent Registration No. 10-0347855 (2002.07.25)

The present invention is to solve the problems that may occur when the air-laid method using carbon fiber is applied, and it is used as an intermediate material by providing a method for manufacturing a carbon fiber mat and a carbon fiber mat impregnated with a thermosetting resin using a dry method. This is to enable mass production of high-strength carbon fiber composite parts.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

The present invention is a continuous transport unit for continuously transporting the material is sequentially stacked; A carbon fiber supply unit located upstream of the continuous transport unit; And a processing unit located downstream of the continuous transport unit than the carbon fiber supply unit, and processing the laminated carbon fibers supplied through the carbon fiber supply unit into a carbon fiber mat. It provides a carbon fiber mat manufacturing apparatus comprising: .

In addition, the carbon fiber supply unit further includes a pulverizing means for pulverizing the carbon fiber into short fibers, and provides a carbon fiber mat manufacturing apparatus for supplying carbon fibers having a size of 0.1 to 2 inches.

In addition, the carbon fiber supply unit includes at least two spike rollers in a housing with a carbon fiber inlet at an upper end and an open lower end, and a vacuum device at the lower end, so that the carbon fiber passes through the spike rollers and a continuous transport unit at the lower end It provides a carbon fiber mat manufacturing apparatus further comprising a treatment means to be sucked into.

In addition, the present invention is a continuous transport unit for continuously transporting the material is sequentially stacked; A supply unit including a first resin film supply unit, a carbon fiber supply unit, and a second resin film supply unit sequentially positioned from the upstream of the continuous transport unit; And a processing unit positioned downstream of the continuous transport unit than the supply unit and configured to process the first resin, carbon fiber, and second resin sequentially stacked by being supplied through the supply unit into a carbon fiber mat. It provides a mat manufacturing apparatus.

In addition, the present invention is a method of manufacturing a carbon fiber mat using the carbon fiber mat manufacturing apparatus, a carbon fiber supply step (S40) of continuously applying carbon fibers through a carbon fiber supply unit to a continuous transport unit; And a processing step (S70) of manufacturing a carbon fiber mat by compressing the material moving in the continuous transport unit at a high temperature.

In addition, the carbon fiber provides a carbon fiber mat manufacturing method using recycled carbon fibers having a tensile strength of 200 GPa or more and a tensile strength of 3,000 MPa or more under a condition of 3 to 6 hours heat treatment at 400 to 500°C or 3K to 50K carbon fiber. do.

In addition, the carbon fiber provides a method of manufacturing a carbon fiber mat using recycled carbon fiber recycled through a method of decomposing the epoxy resin in the carbon fiber-reinforced composite material using an inorganic salt and recovering the carbon fiber.

In addition, the present invention is a method of manufacturing a carbon fiber mat using the carbon fiber mat manufacturing apparatus, a first resin supply step of continuously applying an uncured thermosetting resin film through a first resin film supply unit to a continuous transport unit ( S30); A carbon fiber supply step (S40) of continuously coating carbon fibers on the first resin film moving in the continuous transport unit through a carbon fiber supply unit; A second resin supply step (S50) of continuously applying an uncured thermosetting resin film on the first resin film and carbon fibers moving in the continuous transport unit through a second resin film supply unit; And a processing step (S70) of manufacturing a carbon fiber mat by compressing the material moving in the continuous transport unit at a high temperature.

The present invention is a method of manufacturing a carbon fiber-based mat as a material used to manufacture a carbon fiber composite component, and it is possible to provide a method of manufacturing a carbon fiber mat having excellent impregnation, dispersibility and orientation of carbon fibers.

In addition, the present invention can provide a carbon fiber composite component having excellent mechanical strength and lightweight by using a carbon fiber mat prepared by the above method and a carbon fiber mat impregnated with a thermosetting resin.

1 shows a configuration diagram of a carbon fiber mat manufacturing apparatus according to an embodiment of the present invention.
2 shows the results of evaluating tensile strength and tensile stiffness of a carbon fiber composite according to an embodiment of the present invention.

Before describing the present invention in detail below, it is understood that the terms used in the present specification are for describing specific embodiments and are not intended to limit the scope of the present invention, which is limited only by the scope of the appended claims. shall. All technical and scientific terms used in the present specification have the same meaning as commonly understood by those of ordinary skill in the art unless otherwise stated.

Throughout this specification and claims, unless otherwise stated, the term "comprise, comprises, comprising" means to include the recited object, step or group of objects, and steps, and any other object It is not used in the sense of excluding a step, a group of objects, or a group of steps.

Meanwhile, various embodiments of the present invention may be combined with any other embodiments unless there is a clear opposite point. Any feature indicated to be particularly preferred or advantageous may be combined with any other feature and features indicated to be preferred or advantageous. Hereinafter, embodiments of the present invention and effects thereof will be described with reference to the accompanying drawings.

A method of manufacturing a carbon fiber mat according to an embodiment of the present invention will be described. 1 shows an apparatus for manufacturing a carbon fiber mat. The apparatus for manufacturing the carbon fiber mat is a device capable of manufacturing a carbon fiber mat in a continuous process, and includes a continuous transport unit 10, a carbon fiber supply unit 40, and a processing unit 70. Carbon fiber is applied to the continuous transport unit 10 and passed through the processing unit 70 to continuously manufacture a carbon fiber mat. In addition, the carbon fiber mat impregnated with a resin may be continuously manufactured by further including the resin film supply units 30 and 50. In addition, when the manufactured carbon fiber mat further including the film supply units 20 and 60 and the winding unit 80 is wound in several layers on the winding unit 80, it can be separated by the film.

The continuous transport unit 10 is a device that sequentially stacks materials constituting a carbon fiber mat such as a transport film, resin, and carbon fiber to continuously transport, and may use a belt conveyor or the like. . In this case, the part into which the material is injected is referred to as the upstream of the continuous transport unit, and the part from which the input material is processed is referred to as the downstream of the continuous transport unit. The distinction between the upstream and the downstream means a relative position.

The resin film supply unit includes a first resin film supply unit 30 located at a front end of the carbon fiber supply unit 40 and a second resin film supply unit 50 located at a rear end, and the film supply unit includes a carbon fiber supply unit 40 ) And a first film supply unit 20 located at the front end and a second film supply unit 60 located at the rear end. When both the resin film supply unit and the film supply unit are included, the first film supply unit 20 is located at the upper end of the first resin film supply unit 30, and the second resin film supply unit 50 is located on the second film supply unit 60. It is located at the top.

The first film supply unit 20 and the first resin film supply unit 30 are located at the most upstream of the continuous transport unit 10 so that the first film and the first resin film are laminated at the bottom, and then the carbon The fiber supply unit 40 is positioned so that carbon fibers are laminated on the first film and the first resin film, and the second resin film supply unit 50 and the second film supply unit 60 are located at the most downstream, As a configuration in which a second resin and a second film are laminated on the fibers, a first film, a first resin, a carbon fiber, a second resin, and a second film are sequentially laminated on the continuous transport unit 10.

The first film supply unit 20 is located at the most upstream of the continuous transport unit 10 among the supply units, and continuously supplies the transport film so that the materials constituting the carbon fiber mat can be moved and processed on the transport film. , The second film supply unit 60 is located at the most downstream of the continuous transport unit 10 among the supply units and continuously supplies a transport film, so that the upper portion of the manufactured carbon fiber mat is covered and wound around the winding unit 80. .

The first resin film supply unit 30 is a device for impregnating a first resin on the first film transported along the continuous transport unit 10, and the second resin film supply unit 50 is the continuous transport unit 10 It is an apparatus for impregnating a second resin on the first film, the first resin film, and the carbon fiber that are transferred along the line.

The carbon fiber supply unit 40 is a device for applying carbon fibers on the first film and the first resin film transported along the continuous transport unit 10, and supplies short fibers in a pulverized state or various long fibers. Short fibers may be supplied by further comprising a pulverizing means 41 for grinding into short fibers of length and size.

In addition, the carbon fiber supply unit 40 further includes a processing means 42 for improving the dispersibility and directionality of the carbon fiber pulverized into short fibers. When the carbon fiber mat is manufactured, if the dispersibility of the supplied carbon fiber is not good, spaces where the carbon fiber is emptied will occur. There is a problem. In the present invention, carbon fibers can be supplied through the treatment means 42 so as to have excellent dispersibility and no orientation (randomness).

The processing means 42 includes at least two spike rollers in a housing having a carbon fiber inlet at an upper end and an open lower end, and a vacuum device at the lower end of the carbon fiber passing through the spike rollers and Allow it to be aspirated into the transport. The carbon fiber passes through the treatment means 42 and is applied onto the continuous transport unit 10, so that a carbon fiber mat having excellent dispersibility and direction randomness can be manufactured.

The processing unit 70 is located downstream of the continuous transport unit 10 than the second film supply unit 60, so that the first film, the first resin, carbon fiber, the second resin, and the second film are all stacked. As an apparatus for processing into a carbon fiber mat through rolling, the carbon fiber mat can be manufactured by further including a heating means 71 and pressing and rolling simultaneously with heating.

The apparatus for manufacturing the carbon fiber mat further includes a winding unit 80 positioned at the most downstream of the continuous transport unit 10 so that the carbon fiber mat continuously manufactured through the processing unit 70 is wound so that carbon It enables continuous production of fiber mats.

The present invention describes a method of manufacturing a carbon fiber mat and a carbon fiber mat impregnated with a thermosetting resin using the carbon fiber mat manufacturing apparatus.

The carbon fiber mat manufacturing method includes a carbon fiber supply step (S40) and a processing step (S70), or a first film supply step (S20), a carbon fiber supply step (S40), a second film supply step (S60) and a processing step It includes (S70). In the case of including the film supply step, any one or more of the first film supply step and the second film supply step may be included.

More preferably, the continuous transport unit operation step (S10), the first film supply step (S20), the carbon fiber supply step (S40), the second film supply step (S60), the processing step (S70) and the winding step (S80) Include.

In addition, the method of manufacturing a carbon fiber mat impregnated with a thermosetting resin includes a first resin film supply step (S30), a carbon fiber supply step (S40), a second resin film supply step (S50), and a processing step (S70). In the case of including the resin film supply step, any one or more of the first resin film supply step and the second resin film supply step may be included. In addition, a first film supply step (S20) may be included before the first resin film supply step, or a second film supply step (S60) may be further included after the second resin film supply step.

More preferably, the continuous transport unit operation step (S10), the first film supply step (S20), the first resin film supply step (S30), the carbon fiber supply step (S40), the second resin film supply step (S50), 2 It includes a film supply step (S60), a processing step (S70) and a winding step (S80).

The continuous transport unit operation step (S10) is a step of operating the continuous transport unit 10, so that the carbon fiber mat can be continuously produced on a means capable of transporting continuously such as a belt conveyor. By controlling the transport speed of the continuous transport unit 10, properties such as fiber content and thickness of the manufactured carbon fiber mat can be controlled.

The first film supply step (S20) is a step of continuously inputting a transport film to the continuous transport unit 10 through the first film supply unit 20, and the material constituting the carbon fiber mat on the transport film to be introduced Allows (resin and carbon fiber) to be moved and processed.

The first film supplied is coated with a release material that prevents sticking of an adhesive, and is a film coated with silicone, fluorine, polyethylene, etc. on one side or both sides, and has a uniform peeling force and coating thickness, and from ultra-thin to heavy peeling. You can use films with various performances up to.

In the first resin film supply step (S30), a film containing a thermosetting resin composition in an uncured state on the first film moving in the continuous transport unit 10 through the first resin film supply unit 30 (first resin film ) Is added continuously.

The first resin film includes, for example, any one or more resins selected from the group consisting of unsaturated polyester resins, epoxy resins, and phenol resins. In addition, the composition of the resin film may further include a curing agent, a catalyst, a filler, a pigment, a thickener and a release agent in addition to the resin.

In the first resin film supply step (S30), a carbon fiber composite intermediate material having various thicknesses and fiber contents may be manufactured according to specifications (weight, thickness) for supplying the first resin film.

The carbon fiber supply step (S40) is a step of continuously applying carbon fibers on the first film and the first resin film moving in the continuous transport unit 10 through the carbon fiber supply unit 40.

The carbon fibers are supplied as short fibers in a pulverized state, or when a pulverizing means 41 is further included in the carbon fiber supply unit 40, pulverization occurs simultaneously or sequentially while introducing long fibers to be supplied as short fibers. In addition, carbon fibers that have not been pulverized to a desired size by the pulverizing means 41 while passing through the processing means 42 can be additionally pulverized to a desired size, and excellent dispersibility and directional randomness can be applied.

The carbon fibers are supplied as short fibers having a size of 0.1 to 2 inches. Preferably, it is good to be supplied as short fibers of 1 to 2 inches in size. More specifically, carbon fibers having an aspect ratio (length/diameter) of 1 to 20 are used. Mechanical properties can be changed according to the aspect ratio, and intermediate materials can be manufactured by controlling the aspect ratio according to the properties of the final application product. The carbon fibers are pulverized to a size of 0.1 to 2 inches through a pulverizing means, and at this time, carbon fibers outside the above-described size can be pulverized to a desired size once again through a processing means and uniformly dispersed.

The carbon fibers may be 3K to 50K carbon fibers, B-class carbon fibers treated as defective products during product manufacturing, and recycled (recycled) carbon fibers. Recycled carbon fiber includes all carbon fibers recovered by mechanical treatment and chemical treatment including pyrolysis or chemical decomposition. In addition, the recycled carbon fiber may be recycled carbon fiber obtained by using scrap generated during the carbon fiber reinforced plastic manufacturing process or by recovering a carbon fiber fabric from waste carbon fiber reinforced plastic, and cutting the recovered carbon fiber fabric.

Preferably, recycled carbon fibers having a tensile strength of 200 GPa or more and a tensile strength of 3,000 MPa or more under heat treatment conditions at 400 to 500° C. for 3 to 6 hours are recommended. More preferably, it is preferable to use recycled carbon fibers through a method of decomposing the epoxy resin in the carbon fiber reinforced composite material using an inorganic salt and recovering the carbon fibers. In this method, the mechanical strength of the recovered carbon fiber is reduced by about 13% or less, which is low or similar compared to the existing decomposition methods. Since it is mild, it has the advantage of being able to recover while almost maintaining the original shape of the carbon fiber impregnated inside the carbon fiber reinforced composite.

The second resin supply step (S50) is a thermosetting resin film in an uncured state on the first film, the first resin, and the carbon fiber moving in the continuous transport unit 10 through the second resin film supply unit 50. 2 Resin film) is continuously applied.

The second resin film, like the first resin film, includes any one or more resins selected from the group consisting of unsaturated polyester resins, vinyl ester resins, epoxy resins, urethane resins, and phenol resins. In addition, the composition of the resin film may further include a curing agent, a filler, a pigment, a thickener, a release agent, etc. in addition to the resin.

In the step of supplying the second resin film (S30), a carbon fiber composite intermediate material having various thicknesses and fiber contents may be manufactured according to specifications (weight, thickness) for supplying the second resin film.

The second film supply step (S60) is a step of continuously injecting a transport film into the continuous transport unit 10 through the second film supply unit 60, which constitutes the carbon fiber mat with the transport film. The material (resin and carbon fiber) is covered so that it can be moved, processed, and continuously wound around the winding unit 80.

The supplied second film is coated with a release material that prevents sticking of an adhesive and is coated with silicone, fluorine, polyethylene, etc. on one or both sides, and has a uniform peeling force and coating thickness, and has a uniform peeling force and a heavy peeling effect. You can use films with various performances up to.

The processing step (S70) is a step of compression processing in a high temperature state, by generating a high temperature through a heating means (71 (not shown)), heating the incoming film and the carbon fiber mat material, and rolling it under pressure to allow resin and This is a step of processing and drawing out a carbon fiber mat containing carbon fibers.

In order to increase the impregnation of the compound, it is preferable to heat in the range of 40 to 85°C before the pressing process, and the pressing pressure is controlled according to the weight per unit area of the intermediate material to be manufactured.

The winding step (S80) is a step of winding the processed and drawn carbon fiber mat on a rotating roller to continuously obtain a carbon fiber mat of a finished product. By adjusting the rotation speed, the carbon fiber mat is wound so that it does not slip or fall off.

The weight of the carbon fiber mat manufactured according to the manufacturing apparatus and manufacturing method of the present invention is 10 to 4,000 g/m ² , and may be selectively manufactured within the above range depending on the impregnating resin.

Examples and Comparative Examples

Using the apparatus according to the present invention, a carbon fiber mat was prepared with the carbon fiber content shown in Table 1 below. Examples 1 to 3 used an apparatus including a pulverizing means and a processing means according to the present invention, Example 4 used an apparatus excluding a processing means (spike apparatus), and Comparative Example 1 was a wet laid method. Was used, and in Comparative Example 2, a carbon fiber mat was manufactured using an apparatus of a carding method.

In addition, Examples 1, 4 and Comparative Example 1 used 30K-40K of carbon fiber, Example 2 used recycled carbon fiber obtained by pyrolysis of a carbon fiber-reinforced composite, and Example 3 was used as a carbon fiber Recycled carbon fiber obtained by chemically decomposing the reinforced composite material was used.

Carbon fiber content (vol%) Manufacturing method Example 1 58.7 Air laid+spike roller Example 2 40.8 Air laid+spike roller Example 3 33.2 Air laid+spike roller Example 4 58.7 Air laid Comparative Example 1 40.8 Wet laid Comparative Example 2 33.2 Carding

Experimental example

Table 2 shows the results of evaluating tensile strength and tensile stiffness as a result of evaluating mechanical properties after forming a carbon fiber composite laminate by overlapping several sheets of the prepared carbon fiber mat, and Fig. 2 shows the results of Examples 1 to 3 The results of evaluation of tensile strength and tensile stiffness are shown in FIG. 2.

Carbon fiber content
(vol%) Tensile strength(MPa) Chord modulus of elasticity(GPa) x-direction y-direction x-direction y-direction Example 1 58.7 323.27 358.53 48.23 43.85 Example 2 40.8 269.91 219.34 36.69 31.23 Example 3 33.2 189.29 199.44 23.96 25.39 Example 4 58.7 297.13 322.67 37.71 29.34 Comparative Example 1 40.8 215.63 186.15 24.64 17.68 Comparative Example 2 33.2 159.71 184.87 19.78 26.79

From the tensile strength results of Tables 2 and 2, the x-direction and y-direction indicate 0°/90°. As the deviation between the two directions decreases, it can be determined that the cut fibers are arranged randomly.

Features, structures, effects, and the like illustrated in each of the above-described embodiments can be combined or modified for other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Accordingly, contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

10: continuous transport
20: first film supply unit
30: first resin film supply unit
40: carbon fiber supply unit
41: grinding means
42: treatment means
50: second resin film supply unit
60: second film supply unit
70: processing part
71: heating means
80: winding part

Claims (8)

A continuous transport unit in which materials are sequentially stacked and continuously transported;
A carbon fiber supply unit located upstream of the continuous transport unit; And
Including; a processing unit located downstream of the continuous transport unit than the carbon fiber supply unit, for processing the stacked carbon fibers supplied through the carbon fiber supply unit into a carbon fiber mat,
The carbon fiber supply unit includes a pulverizing means capable of pulverizing long fibers into short fibers, a carbon fiber inlet at an upper end, at least two spike rollers in a housing with an open lower end, and a vacuum device at the lower end. Thus, it includes a treatment means for allowing the carbon fiber to pass through the spike roller and sucked into the continuous transport unit at the bottom,
The processing means pulverizes the carbon fiber passing through the spike roller, and is applied with excellent directional randomness of the carbon fiber to the continuous transport unit, so that the carbon fiber mat is stretched in the x and y directions at 90 degrees to each other. Reduce the variation in intensity,
The carbon fiber has an aspect ratio of 1 to 20 and is a carbon fiber mat manufacturing apparatus which is a recycled carbon fiber supplied in a size of 1 to 2 inches.
delete delete A continuous transport unit in which materials are sequentially stacked and continuously transported;
A first film supply unit positioned upstream of the continuous transport unit to continuously supply a first film,
A first resin film supply unit for impregnating a first resin film on the first film, which is located downstream of the first film supply unit and transferred,
A carbon fiber supply unit located downstream of the first resin film supply unit and for coating carbon fibers with excellent direction randomness on the first film and the first resin film transferred along the continuous transport unit,
A second resin film supply unit positioned downstream of the carbon fiber supply unit to form a carbon fiber composite intermediate material by impregnating a second resin film on the carbon fiber transferred along the continuous transport unit, and
A supply unit including a second film supply unit positioned downstream of the second resin film supply unit to supply a second film to the carbon fiber composite intermediate material of the continuous transport unit; And
A processing unit located downstream of the second film supply unit and processing the first film, the first resin film, the carbon fiber, the second resin film, and the second film sequentially stacked by being supplied through the supply unit into a carbon fiber mat Including ;,
The first film and the second film is a carbon fiber mat manufacturing apparatus configured by applying a release material.
As a method of manufacturing a carbon fiber mat using the carbon fiber mat manufacturing apparatus of claim 1,
A carbon fiber supply step (S40) of receiving carbon fibers from the processing means and continuously applying them to a continuous transport unit; And
Processing step (S70) of manufacturing a carbon fiber mat by compressing the material moving in the continuous transport unit at a high temperature.
The method of claim 5,
The carbon fiber is a carbon fiber mat manufacturing method using recycled carbon fibers having a tensile strength of 200 GPa or more and a tensile strength of 3,000 MPa or more under a heat treatment condition at 400 to 500°C for 3 to 6 hours.
The method of claim 5,
The carbon fiber mat manufacturing method using recycled carbon fiber recycled through a method of decomposing the epoxy resin in the carbon fiber reinforced composite material using an inorganic salt and recovering the carbon fiber.
As a method of manufacturing a carbon fiber mat using the carbon fiber mat manufacturing apparatus of claim 4,
A first film supply step (S20) of continuously inputting a first film to the continuous transport unit through the first film supply unit to a continuous transport unit;
A first resin supply step (S30) of continuously applying an uncured thermosetting resin film on the first film through the first resin film supply unit;
A carbon fiber supply step (S40) of continuously coating carbon fibers with excellent directional randomness on the first resin film moving in the continuous transport unit through the carbon fiber supply unit;
A second resin supply step (S50) of continuously applying an uncured thermosetting resin film on the first resin film and carbon fibers moving in the continuous transport unit through the second resin film supply unit;
A second film supply step (S60) of continuously injecting a second film into the continuous transport unit through the second film supply unit; And
Processing step (S70) of manufacturing a carbon fiber mat by compressing the material moving in the continuous transport unit at a high temperature.

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